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Evaluating cleaners for removal.
Seven cleaners were selected based on previous trial. Solutions were diluted to 5% using DI water in 250 ml beakers. All solutions were heated to 120 F on a hot plate.
Twenty-one preweighed coupons were coated with the supplied slurry using a hand held swab and allowed to dry for 2 hours. These coupons were then weighed again. Three coupons were immersed into each beaker to be cleaned for 5 minutes. After the cleaning, the coupons were rinsed in DI water and dried using air blow off. Coupons were then weighed a final time and percent efficiencies were calculated for each cleaner.
Saint Gobain Industrial Ceramics Water Based Alumina (1344-28-1, 102-71-6)
All seven cleaners removed over 94% of the alumina from the ceramic coupons in the five minutes of cleaning. ND 17 and LPS were the most effective removing just over 97%. The following table lists the calculated efficiencies.
Table 1. Cleaning Efficiencies
|Cleaner||Coupon 1||Coupon 2||Coupon 3||Average||Std Dev||Rank|
Success Rating:A follow up test, usually based on company input.
In order to obtain 100% removal of the contaminant, two simple options could be taken. The first would be to increase the cleaning time and the second would be to use ultrasonic equipment.